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run code in 300+ PHP versions simultaneously
<?php namespace Foo\Bar { class Baz { function __construct() { var_dump(get_class()); } } } namespace Foo { class Bar { function __construct() { var_dump(get_class()); } } } namespace { use Foo\Bar; new Bar(); new Bar\Baz(); }

preferences:
41.4 ms | 402 KiB | 5 Q